Computer problem with fan

yesterday i installed my new case fans and i had no more fan headers on my mobo so i used a molex connector and put it straight into my psu when i went to boot my pc the fan was working and everything but my pc kept starting and shutting off over and over. once i disconnected the fan the problem went away. anyone know whats wrong and how i could connect my fan without having this problem
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  1. What brand/power is your PSU? I never heard of a fan causing problems with one fan running off of a 4 pin molex.
  2. I've never heard of that either. You might want to try a 3-pin Female to 2 x 3-pin Male fan power splitter cable. Look at this one to see what I mean. ( - -)
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